Stamp-battery



(No Model.) 2 Sheets-Shet 1.

M. P. BOSS.

STAMP BATTERY.

No. 416,893. Patented Dec. 10,1889.

N. PETERS. Fhnln-Lflhogmpher. Washinghm. D. C.

(No Model.) '2 Sheets-Sheet M. P. BOSS.

STAMP BATTERY.

No. 416,893. Patented Dec. 10, 1889..

UNITED STATES PATENT OFFICE.

MARTIN P. BOSS, OF SAN FRANCISCO, CALIFORNIA.

STAM P-BATTERY.

SPECIFICATION forming part of Letters Patent No. 416,893, dated December 10, 1889.

Application filed February 23, 1889. Elerial No. 300,926- (No model.)

To all whom it may concern:

Be it known that I, MARTIN P. Boss, of the city and county of San Francisco, and State of California, have invented an Improvement in Stamp-Batteries; and I hereby declare the following to be a full, clear, and exact description thereof.

My invention relates to the class of stamp batteries or mills; andmy invention consists in the constructions and combinations of devices which I shall hereinafter fully describe and claim.

Figure 1 is a side elevation of my stampbattery, some of the parts being broken away. Fig. 2 is a front elevation of same.

My stamp-battery is of the general type known as iron-frame batteries.

A is a sole or bed plate, which is to be firmly secured to a masonry foundation.

B is the iron frame, consisting of four castings in all, to wit: the two side castings b, the single top casting Z2, bolted to the top of the side castings, and the cross-casting b bolted to and between the side castings and which forms the guide, for the stamp-stems. Theside castings are bolted down to the sole or bed plate, preferably with an intervening piece of wood WV, which serves as a cushion.

ies the frame is directly secured to and built up from the mortar. The jar of the stamps is therefore carried directly to the frame, and there is considerable strain and racking thus put upon it.

- The improvement in my construction is that the frame and the mortar are not directly' connected, but are both bolted to the the stamps E.

ber of joints and materially increasing the rigidity of the entire structure.

D is the cam-shaft having the cams d,which operate under the tappets e of the stems e of The boxes F, in which this cam-shaft is mounted, arevformed directly in and are integral with the side castings b of the iron frame. These boxes are made semi-. circular, entrance for the shaft being gained through wideopen fronts f, made in the castings. There are no tops for the boxes, the shaft lying directly in them and is held therein by its own weight and the weight of the stamps on which its cams operate.

The mortar is provided' with the usual side screen 0. Its top is thus constructed: An in-.

wardly and downwardly extending flange c is formed on its inner front side, and a short straight flange o is formed on its innerrean side. Bolted to the ends of the flanges, top and bottom, are packing-strips c ,which come up close to the stamps E, said stamps thus working up and down in the space between the packing-strips, which come up into con.

tact with the stamps and form suitable protecting-joints therefor.

The advantage of the downwardly-inclined flange c is that it better receives and directs the splash to the screen, for, on account of its inclination, any pulp striking it must rebound directly upon the screen.

In stamp-mills of this class where the stamps drop only by their own weight unassisted by any accelerator, they cannot be driven beyond a certain speed, for the cams will, if rotated too rapidly, catch the tappets before the stamps have delivered their blow. Accordingly, springs have been used to accelerate the drop of the stamps, so as to provide for a more rapid operation. The feature in this regard in my battery lies in the arrangement of the accelerators,whereby they are adapted to be readily thrown into action or out of use, according as a more rapid drop or a normal operation is required.

G are brackets secured to the top of frame B. On these are mounted the heavy springs H, each having passing through its center a rod I, with a washer i and nut on top bearing on the of top of the spring. The rod'passes down through the bracket G, and its lower,

the arm through the lever J and rod I com-- presses the spring H, and as soon as the tappet is relieved of the cam the spring, expand ing and acting through the rod, lever, and arm, throws the stamp down instantly.

When the accelerating-springs are not required, the arms K are pulled and held out of the way of the tappets. Thus the springs may be readily called into or thrown out of action as required.

To provide a means suitable in all cases for hanging up the stamps andone easily operated, I have the following construction:

Mounted in suitable bearings and transversely of the frame are short rocking eccentrics L, each provided with a hole Z, into which a bar is to be inserted in order to rock the eccentrics.

M are the hanging-up fingers, the lower ends of which are mounted upon the eccentrics. The top of each fin ger has a head 12, through which passes a bolt on, having a bearing-plate m 011 its top. Under this bearing-plate and resting on the head m are a number of elastic washers m forming a cushion and held in place by the bolt m, which is tightened down by a nut m below. Now, when a stamp is raised as high as possible on its cam the finger M, which is then at its lowest position, is thrown in, so that the cushioned bearing-plate m of its top comes under the tappet. Then the eccentric L is rocked by the bar-lever inserted in its hole Z, so as to raise the finger M, and the tappet is thereby raised on thetop of said finger and hung up.

The cushioned plate on? relieves the finger of any jar.

Having thus described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. In a stamp-battery, the mortar having the screen in its side and its top constructed with an inwardly and downwardly extending flange c for directing the splash of the pulp to the screen, and a short straight flange c on its inner rear side, and packing-strips upon theupper and lower surfaces of thefianges and bolted together and to said flanges, and forming a protecting-joint for the stamps, substantially as described.

2. In a stamp-battery, and in combination with its stampsand the tappets on their stems, the accelerator-springs and swinging arms connected therewith adapted to be thrown into or out of engagement with the tappets, whereby the springs are called into or thrown out of action, substantially as described.

3. In a stamp-battery, and in combination with its stamps and the tappets on their stems, the springs, the rods passing through them, the pivoted levers engaging the rods, and the swinging arms connected with the levers and adapted to be thrown into or out of engagement with the tappets, substantially as described.

4. In a stamp-battery, and in combination with its stamps and the tappets of their stems,- the hanging-up fingers, the upper ends of which are adapted to be thrown under the tappets, and the rocking eccentrics on which the lower ends of the fingers are mounted,

whereby said fingers are raised when under the tappets to elevate the stamps, substantially as described.

5. In a stamp-battery, the frame, the camshaft with its cams, and the stamps with their stems and tappets, in combination with the rocking eccentrics mounted in the frame, and hanging-up fingers having their lower ends mounted on the eccentrics, whereby they can be raised and lowered and their upper ends adapted to operate under and in contact with the stem-tappets when raised by the cams, substantially asv described.

6. In a stamp-battery, the adjustable eccentries, the hanging-up fingers carried thereby and having their upper ends provided with cushions and adapted to bear up under the stamp stem tappets, substantially as described.

7. In astamp-battery, the adjustable eccentries and the hanging-up fingers having heads,

in combination with the bolts passing through the heads and having bearing-plates on their upper ends, and the cushion-washers confined between said plates and the heads of the fingers, substantially as desbribed.

8. In a stamp-battery, and in combination with the stamps and the tappets of their stems, the hangingeup fingers having heads, the bolts passing through theheads and having top bearing-plates, and the cushion-washers be tween the plates and the heads of the fingers, and the rocking eccentrics on which the lower ends of the fingers are mounted, whereby they may be raised and lowered, substantially as described.

It witness whereof I have hereunto set my hand.

MARTIN P. BOSS. llnesses:

S. H. NOURSE, J. H. 131.001). 

